1 files changed, 137 insertions, 0 deletions
diff --git a/vendor/league/uri-interfaces/IPv6/Converter.php b/vendor/league/uri-interfaces/IPv6/Converter.php
new file mode 100644
index 000000000..f645c1da2
--- /dev/null
+++ b/vendor/league/uri-interfaces/IPv6/Converter.php
@@ -0,0 +1,137 @@
+<?php
+
+/**
+ * League.Uri (https://uri.thephpleague.com)
+ *
+ * (c) Ignace Nyamagana Butera <nyamsprod@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace League\Uri\IPv6;
+
+use Stringable;
+use ValueError;
+
+use function filter_var;
+use function implode;
+use function inet_pton;
+use function str_split;
+use function strtolower;
+use function unpack;
+
+use const FILTER_FLAG_IPV6;
+use const FILTER_VALIDATE_IP;
+
+final class Converter
+{
+    /**
+     * Significant 10 bits of IP to detect Zone ID regular expression pattern.
+     *
+     * @var string
+     */
+    private const HOST_ADDRESS_BLOCK = "\xfe\x80";
+
+    public static function compressIp(string $ipAddress): string
+    {
+        return match (filter_var($ipAddress, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
+            false => throw new ValueError('The submitted IP is not a valid IPv6 address.'),
+            default =>  strtolower((string) inet_ntop((string) inet_pton($ipAddress))),
+        };
+    }
+
+    public static function expandIp(string $ipAddress): string
+    {
+        if (false === filter_var($ipAddress, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
+            throw new ValueError('The submitted IP is not a valid IPv6 address.');
+        }
+
+        $hex = (array) unpack('H*hex', (string) inet_pton($ipAddress));
+
+        return implode(':', str_split(strtolower($hex['hex'] ?? ''), 4));
+    }
+
+    public static function compress(Stringable|string|null $host): ?string
+    {
+        $components = self::parse($host);
+        if (null === $components['ipAddress']) {
+            return match ($host) {
+                null => $host,
+                default => (string) $host,
+            };
+        }
+
+        $components['ipAddress'] = self::compressIp($components['ipAddress']);
+
+        return self::build($components);
+    }
+
+    public static function expand(Stringable|string|null $host): ?string
+    {
+        $components = self::parse($host);
+        if (null === $components['ipAddress']) {
+            return match ($host) {
+                null => $host,
+                default => (string) $host,
+            };
+        }
+
+        $components['ipAddress'] = self::expandIp($components['ipAddress']);
+
+        return self::build($components);
+    }
+
+    private static function build(array $components): string
+    {
+        $components['ipAddress'] ??= null;
+        $components['zoneIdentifier'] ??= null;
+
+        if (null === $components['ipAddress']) {
+            return '';
+        }
+
+        return '['.$components['ipAddress'].match ($components['zoneIdentifier']) {
+            null => '',
+            default => '%'.$components['zoneIdentifier'],
+        }.']';
+    }
+
+    /**]
+     * @param Stringable|string|null $host
+     *
+     * @return array{ipAddress:string|null, zoneIdentifier:string|null}
+     */
+    private static function parse(Stringable|string|null $host): array
+    {
+        if (null === $host) {
+            return ['ipAddress' => null, 'zoneIdentifier' => null];
+        }
+
+        $host = (string) $host;
+        if ('' === $host) {
+            return ['ipAddress' => null, 'zoneIdentifier' => null];
+        }
+
+        if (!str_starts_with($host, '[')) {
+            return ['ipAddress' => null, 'zoneIdentifier' => null];
+        }
+
+        if (!str_ends_with($host, ']')) {
+            return ['ipAddress' => null, 'zoneIdentifier' => null];
+        }
+
+        [$ipv6, $zoneIdentifier] = explode('%', substr($host, 1, -1), 2) + [1 => null];
+        if (false === filter_var($ipv6, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
+            return ['ipAddress' => null, 'zoneIdentifier' => null];
+        }
+
+        return match (true) {
+            null === $zoneIdentifier,
+            is_string($ipv6) && str_starts_with((string)inet_pton($ipv6), self::HOST_ADDRESS_BLOCK) =>  ['ipAddress' => $ipv6, 'zoneIdentifier' => $zoneIdentifier],
+            default => ['ipAddress' => null, 'zoneIdentifier' => null],
+        };
+    }
+}